Printing-press.



No. 698,344. f Patented Apr. 22, i902.`

A. P. WARNER.

PRINTING PRESS. (Application med July 19, 1901.) (No Model.)

UNITED STATES PATENT I OFFICE.

AUSTIN P. WARNER, OF BATTLECREEK, MICHIGAN, ASSIGNOR 'l-O THE DUPLEXPRINTING PRESS COMPANY, OF BATTLECREEK, MICHIGAN.

PRINTINGfPRESS.

SPECIFICATION formingpart of Letters Patent N O. 698,344, dated April22, 1902. Application lerl July 19, 1901. SerialNo. 68,933. (No model.)

To a/ZZ whom, t may concern:

Be it known thatl, AUSTIN P. WARNER, of Battlecreek, in' the county ofCalhoun and State of Michigan, have invented certain new andusefulImprovementsinPrinting-Presses5 and I hereby declare thaty thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, which form partof thisspecification. lo This invention is an improvement in bedand cylinderpresses, particularly webpresses, wherein movable impression-cylin-`ders are reciprocated back and forth over type-beds to print webs, asinthe Well-known Cox duplex press, for example. l It is important in thisstyle of presses that the impression-cylinder shall be packed so thatits pe.- riphery will correspond exactly with the pitchline of thecylinder-gear by which the cylinzo der is kept in time with the bed. Ifthe cylinder be packed too much, so as to increase its diameter evenvery slightly beyond the exact size, it would ordinarily result in theperiphery of the cylinder moving slightly 2 5 faster than it should do,thereby creating a tendency to grind the face of the type and to feedthe web over the type While being impressed. On the other hand, if thecylinder be packed too little, so that it is slightly less 3o than theproper diameter, it would ordinarily cause the periphery of the cylinderto lag or drag on the type and tend to pull back the paperduringimpression, which will crack or tear the web. This improperpacking of 3 5 the impressioncylinder with the incident damage resultingtherefrom is a source of great annoyance in many press-rooms where thepressman is careless in packing the cylinders.

4o The object ofthis invention, therefore, is to reduce Wear on the typeand prevent breaking or cracking the Webs during the printing operationwhen such wear and cracking would be caused by the improper packing ofthe surface of the impression-cylinder, and the invention consists inmeans for compensating for improper packing of the cylinder andpermitting it to move only at the proper peripheral speed while on thetype and to compen- 5o sate the cylinder after each impression, so

'ing it to normal position.

that it will always begin its operation in the correct timeand position.

The invention, in brief, resides in making one member of the bed andcylinder-gearing slightly movable, but holding it to its normal 5 5position by sti springs, so that the cylinder will be kept in time androlled properly over the bed as if each member of such gearing wasabsolutely iiXed to its support, as in ordinary press constructions; butif the cylin- 6o der be packed too high or too low the springcontrolledmember will yield sufficiently to prevent grinding of the type orcracking of web while the cylinder is on impression, and as soon as thecylinder passes off impression the spring will return the gear member toits original position, thereby slightly turning the cylinder forward orbackward and bring- The actual corrective movement of the cylinder ineither 7o case will bevery slight, possibly less than an eighth of aninch, but that this amount of drag or acceleration during impressionwould be sufficient to damage the type or web, as is obvious. i 7 5 Inthe drawings I have shown the bed-rack member ofthe gearing as thespring-controlled member, asit is perhaps simpler to make the bed-rackspring-retained than the cylinder-gear, although the practical eect 8owould be the same ifthe bed-rack was rigidly secured and thegear-springvsecured on the cylinder.

I will now describe the invention as illustrated in the drawings,wherein; 8 5 Figure l is a detail side elevation of the bed4 andcylinder of a press, and Fig. 2 a top plan view of Fig. l.

A represents the impression-cylinder, having packing B, bearers C, andgear F, as 9o usual.

K is the type-bed, coacting with the cylinder.

D D are straight bearers ooacting with cylinder-bearers C, and E is thebed-rack, meshing 1 with cylinder-gear F. This rack E is usually rigidlybolted to the frame and its office, in connection with the cylinder-gearF, is to cause the periphery of the cylinder to move uniformly inrelation to the bed. In the preszoo I the cylinder is underpacked, sothat its periphery tends to `drag on the typeor web, the rack will yieldsufliciently to prevent the cylinder damaging the type or web. In thesame manner the rack will yield if the cylinder be overpacked. In eithercase as soon as the cylinder is off impression, as indicated at A A2 inthe drawings, the springs return the lftk E to proper central position,and this movement of the rack returns the cylinder also to true initialposition after each impression.

Having thus described my invention, what I therefore claim as new, anddesire to secure by Letters Patent thereon, is-

l, The combination of a'cylinder and bed, and the bed andcylinder-gearing, one member of such gearing being normally held toplace by springs whereby'a slight abnormal increase or'decrease of speedof movement of the periphery of the cylinder is permitted duringimpressions by the bodily shifting of one of such members, said springreturning the gearing to proper normal position after impressions,substantially as described.

2. The combination of a cylinder and bed, a gear on the cylinder, and arack on the bed or frame meshing with said cylinder-gear, said rackbeing capable of a slight bodily endcylinder and prevent grind or dragon the type, substantially as described.

4. The combination of the cylinder and bed, the cylinder-gear, and amovable bed-rack continually in mesh With the cylinder-gear and springsat each end of the rack to hold the same Ain normal position but permitits shifting during impression, substantially as and for the purposedescribed.

5. The combination of the cylinder, its gear, the bed, and the one-piecebed-rack having slotted ends and continually in mesh with the cylinder,guide-pins on the'bed or frame engaging the rack-slots, and stilisprings interposed'between the opposite ends of the rack and lugs orstops on the frame for yieldingly holding said rack in position,substantially as described.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

AUSTIN P. WARNER.

In presence ofr Jos. H. J oNEs, Il. P. KUNTZ.

